JZS147 Toyota Aristo 2JZ-GTE Engine ECU Pinout

JZS147 Toyota Aristo 2JZ-GTE Engine ECU Pinout

Introduction

This page provides information in regards to 2JZ-GTE engine wiring as found in the Japanese JZS147 Toyota Aristo.

JZS147 Toyota Aristo 2JZ-GTE Engine ECU Part Numbers

Toyota Part Number

Dates

Transmission

89661-30560

10/1991 to 08/1993

Automatic Transmission

89661-30870

08/1993 to 08/1997

Automatic Transmission

JZS147 Toyota Aristo 2JZ-GTE Engine ECU Pinout

Plug

Pin

Symbol

Definition

Input/Output

What

Why

How

Link

40 Pin Plug

1

IGSW

Ignition Switch

Input

This pin is used to determine if the ignition is ON.

The engine ECU is turned on by this signal.

This pin is connected to battery voltage when the ignition switch is in RUN and CRANK positions.

40 Pin Plug

2

SP1

No.1 Speed Sensor

Input

This pin is used to determine vehicle speed.

Vehicle speed is used in idle control, automatic transmission shift control, speed limiting etc. Two speed sensors are used to provide a backup.

This pin is connected to the combination meter speed output which outputs 4 pulses (Open collector square wave pulses) per No.1 speed sensor shaft revolution. The combination meter receives its speed signal from the No.1 speed sensor which is located on the right, rear side of automatic transmission and outputs 4 pulses (0 to Battery Voltage square wave pulses) per sensor shaft revolution.

40 Pin Plug

3

KD

Kick Down Switch

Input

This pin is used to detect when the accelerator pedal is fully depressed.

Used to ‘kick down’ or change down a gear of automatic transmission under full throttle.

This pin is Grounded by a switch that is located under the accelerator pedal that is pressed at full throttle. The Kick Down switch is open circuit when the switch is not pressed (Accelerator pedal is not fully depressed). Note: 1991-10 to 1993-08 models only, later models do not have this pin wired or a Kick Down switch installed.

This pin is connected to battery voltage when brake pedal is depressed, the ECU pin is open circuit when the brake pedal is not depressed.

40 Pin Plug

5

EGW

Exhaust Gas Temperature Warning Light (Catalytic Converter)

Output

This pin is used to turn ON / OFF the exhaust gas warning light.

The exhaust gas warning light comes on to inform of an overheated catalytic converter.

This pin is Grounded by the ECU as required to turn the exhaust gas warning light ON. Light ON = Error Condition, light OFF = Normal.

40 Pin Plug

6

W

Engine Warning Light (Check Engine Light)

Output

This pin is used to turn ON / OFF the check engine light.

The check engine light comes on to inform of a detected engine issue.

This pin is Grounded by the ECU as required to turn the Check Engine Light ON. The check engine light should be wired with one side of the light connected to battery voltage (Ignition Switched) and one side of the light connected to this ECU pin. Light ON = Error Condition, light OFF = Normal.

40 Pin Plug

7

R

Reverse Gear Automatic Transmission Position Indicator

Input

This pin is used to determine if the automatic transmission shifter is in the Reverse position.

The engine ECU needs to energize/de-energize the automatic transmission solenoids to select the correct gear.

This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the ‘R’ position.

40 Pin Plug

8

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40 Pin Plug

9

2

2nd Gear Automatic Transmission Position Indicator

Input

This pin is used to determine if the automatic transmission shifter is in the 2nd position.

The engine ECU needs to energize/de-energize the automatic transmission solenoids to select the correct gear.

This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the ‘2’ position.

40 Pin Plug

10

L

Low Gear Automatic Transmission Position Indicator

Input

This pin is used to determine if the automatic transmission shifter is in the L position.

The engine ECU needs to energize/de-energize the automatic transmission solenoids to select the correct gear.

This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the ‘L’ position.

40 Pin Plug

11

AD

Auto Drive

Input

This pin is used to signal that cruise control is ON to the engine ECU.

Currently unsure what exact action the engine ECU takes based on this signal.

This pin is Grounded by the Cruise Control ECU when Auto Drive is engaged.

40 Pin Plug

12

OD1

Over Drive Disable 1

Input

This pin is used by the Cruise Control ECU to request to disable the automatic transmission over drive gear (4th Gear).

The cruise control ECU may need to change to 3rd gear from 4th gear (over drive) to maintain the desired set speed.

This pin is Grounded by the Cruise Control ECU to disable the automatic transmissions over drive gear.

40 Pin Plug

13

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40 Pin Plug

14

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40 Pin Plug

15

ELS

Electrical Load Sense

Input

This pin is used to signal that heavy electrical loads are ON (e.g. rear demister).

Heavy electrical loads place more load on the alternator and hence the engine, the engine ECU can adjust for these heavy electrical loads if it is aware of them.

This pin is connected to battery voltage when a heavy electrical load is ON.

40 Pin Plug

16

TRI

Timing Retard 1?

Input

Timing Retard perhaps?

Reduced ignition time will reduce engine power which is used by the Traction Control ECU to attempt to maintain traction.

This pin connects to the Traction Control ECU pin MPC. Perhaps this should be labelled TR1 and have a similar function to TR2?

40 Pin Plug

17

TT

Test Terminal

Output

This pin is used to output a diagnostic voltage dependent on throttle position, brake pedal position and automatic transmission gear position.

Used to help in diagnosing issues with the TPS, brake and automatic transmission.

Refer to TT section.

40 Pin Plug

18

P

Power / Normal Auto

Input

This pin is used to select Power or Normal shift patterns for the automatic transmission.

Used to modify the automatic transmission shift points to make the automatic transmission shifts more performance orientated.

This pin is connected to battery voltage when the Power / Normal switch is in the Power position. Pin is open circuit when the Power / Normal switch is in the Normal Position. In power mode gears are held longer and the automatic transmission will not select 1st gear when the automatic shifter is manually placed in the ‘2’ position.

40 Pin Plug

19

TE2

Test mode select 2

Input

This pin is used to select the test mode during which diagnostic serial data is sent out the VF1 pin.

Used to help in diagnosing issues.

This pin is connected to Ground to enable test mode.

40 Pin Plug

20

TE1

Test mode select 1

Input

This pin is used to select the test mode during which diagnostic codes are flashed on the check engine light .

Used to help in diagnosing issues.

This pin is connected to Ground to enable test mode.

40 Pin Plug

21

DI

Diagnostic Indication – Fuel Pump Control

Input

This pin is used to determine if the Fuel Pump ECU is healthy.

Lets the engine ECU know if the Fuel Pump ECU is healthy, if the Fuel Pump ECU is not healthy the engine ECU stops the output on the FPC pin.

This pin is connected to battery voltage when the Fuel Pump ECU is healthy, the pin is open circuit when Fuel Pump ECU is not healthy.

40 Pin Plug

22

FPC

Fuel Pump Control

Output

This pin is used to signal the desired fuel pump speed to the Fuel Pump ECU.

The fuel pump speed can be reduced at low load conditions to make the fuel quieter and improve fuel pump longevity.

This pin outputs a 0V to 5V Pulse Width Modulated (PWM) signal which is connected to the Fuel Pump ECU to control fuel pump speed.

40 Pin Plug

23

ACMG

Air Conditioning (AC) Magnetic Clutch Relay

Output

This pin is used to turn the AC magnetic clutch relay ON.

ECU control of the AC enables the AC to be turned off during hard acceleration.

This pin is Grounded by the ECU as required to turn the AC magnetic clutch relay ON. One side of the AC magnetic clutch relay coil should be wired to this pin and one side of the AC magnetic clutch relay coil should be connected to battery voltage (Ignition switched) and one side of the relay coil connected to this ECU pin.

40 Pin Plug

24

M-REL

EFI Main Relay

Output

This pin is used to turn ON the Main EFI Relay which feeds power to the fuel pump, engine ECU, ISCV, engine VSVs and O2 sensor heater circuits, etc.

ECU control of the main power relay allows the ECU to remain powered up after engine shutdown to fully open the ISCV.

This pin is connected to battery voltage inside the ECU as required to turn the Main EFI Relay ON when the ignition switch is ON. Note that this pin continues to output voltage for a few second after the ignition has been switched off to allow the ISCV to be fully opened by the ECU for the next engine start. One side of the Main EFI Relay coil should be connected to this pin and one side of the Main EFI Relay coil should be connected to Ground.

40 Pin Plug

25

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40 Pin Plug

26

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40 Pin Plug

27

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40 Pin Plug

28

OD2

Over Drive Disable 2

Input

This pin is used to disable the automatic transmission over drive gear (4th Gear) by a user switch.

Used to enable the driver to disable the automatic transmission over drive gear (4th Gear) for towing, hills, etc.

This pin is Grounded by the over drive switch to disable the automatic transmission over drive gear.

40 Pin Plug

29

CCO

Catalytic Converter Temperature Sensor

Input

This pin is used to measure the catalytic converter temperature.

Used to inform the driver of an overheated catalytic converter.

This pin connects to a thermistor that is installed after the catalytic converter to sense the catalytic converter temperature. One side of the thermistor should be wired to this pin and one side of the thermistor should be wired to Ground.

40 Pin Plug

30

TRO

Timing Retard 0?

Input

Timing Retard perhaps?

Reduced ignition time will reduce engine power which is used by the Traction Control ECU to attempt to maintain traction.

This pin connects to the Traction Control ECU pin MPR. Perhaps this should be labelled TR0 and have a similar function to TR2?

40 Pin Plug

31

+B

EFI Main Relay Switched Power

Input

This pin is used to supply switched battery power to the ECU.

Used to supply power.

This pin is connected to battery voltage when the Main EFI Relay is energized to supply power to the ECU. The Main EFI Relay is triggered by the engine ECU pin M-REL pin. This pin is connected inside the ECU to the +B1 pin.

40 Pin Plug

32

+B1

EFI Main Relay Switched Power

Input

This pin is used to supply switched battery power to the ECU.

Used to supply power.

This pin is connected to battery voltage when the Main EFI Relay is energized to supply power to the ECU. The Main EFI Relay is triggered by the engine ECU M-REL pin. This pin is connected inside the ECU to the +B pin.

Having an AC request input and a separate control output allows the engine ECU to turn the AC OFF under some conditions, such as hard acceleration.

This pin is connected to battery voltage to request that the AC be turned ON. The AC request signal is usually generated by the climate control ECU, however connecting this pin to battery voltage will not guarantee that the AC is turned ON.

40 Pin Plug

35

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40 Pin Plug

36

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40 Pin Plug

37

TR2

Timing Retard 2

Input

This pin is used as a signal to request that the engine ECU retard engine ignition timing.

Reduced ignition time will reduce engine power which is used by the Traction Control ECU to attempt to maintain traction.

This pin connects to the Traction Control ECU pin TR2.

40 Pin Plug

38

NEO

Slave Engine Speed Sensor

Output

This pin is used to supply a copy of the engine speed (NE) signal to the traction control ECU.

Engine speed is a useful parameter for traction control.

This pin connects to the Traction Control ECU pin NEO.

40 Pin Plug

39

VTO2

Slave Traction Control Throttle Position Sensor

Output

This pin is used to supply a copy of the analogue traction control throttle position (VTA2) signal to the traction control ECU.

The measured position of the traction control throttle is a useful parameter for traction control.

This pin connects to the Traction Control ECU pin VSH.

40 Pin Plug

40

VTO1

Slave Throttle Position Sensor

Output

This pin is used to supply a copy of the analogue throttle position signal (VTA1) to the traction control ECU.

The measured position of the engine throttle is a useful parameter for traction control.

This pin connects to the Traction Control ECU pin VTH.

80 Pin Plug

1

NCO-

Over Drive Direct Clutch Speed Sensor

Input

This pin is used to detect the speed of the automatic transmission OD input shaft.

Detection of the automatic transmission OD input shaft speed can be used to improve shift timing and ensure smooth gear shifts.

This pin connects to the OD speed sensor located on the left, front side of the automatic transmission and outputs a number of pulses (reluctor pulses) per revolution of the OD direct clutch drum.

80 Pin Plug

2

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80 Pin Plug

3

SP2-

No. 2 Speed Sensor

Input

This pin is used to determine vehicle speed.

Vehicle speed is used in idle control, automatic transmission shift control, speed limiting etc. Two speed sensors are used to provide a backup.

This pin connects to the No.2 speed sensor located on the left, rear side of the automatic transmission and outputs 4 pulses (reluctor pulses) per revolution of the automatic transmission output shaft.

80 Pin Plug

4

E11

ECU Ground

Input

Ground

Used to supply a Ground path to allow current to flow.

This pin connects to Ground or the battery negative.

80 Pin Plug

5

G2-

Cam Position Sensor No.2 (Rear)

Input

This pin is used to detect the location of the intake camshaft.

The engine ECU needs to know if the engine is on the compression or exhaust stroke for sequential spark and ignition, the camshaft position sensor provides this information.

This pin connects to the No.2 camshaft position sensor located to the rear of the intake side of the engine head which outputs 1 pulse (reluctor pulse) per camshaft revolution. A pulse is generated slightly before the TDC on the cylinder 1 compression stroke which is used to determine the engine position for sequential ignition and fuel.

80 Pin Plug

6

G1-

Cam Position Sensor No.1 (Front)

Input

This pin is used to detect the location of the intake camshaft.

The engine ECU needs to know if the engine is on the compression or exhaust stroke for sequential spark and ignition, the camshaft position sensor provides this information.

This pin connects to the No.1 camshaft position sensor located to the front of the intake side of the engine head which outputs 1 pulse (reluctor pulse) per camshaft revolution. A pulse is generated slightly before the TDC on the cylinder 1 exhaust stroke which is used to determine the engine position for sequential ignition and fuel.

80 Pin Plug

7

NE-

Crank Position Sensor

Input

This pin is used to detect the speed and location of the engine crankshaft.

The engine ECU needs to know the position of the engine so that it can accurately provide fuel and ignition.

This pin connects to the engine crankshaft position sensor located to the lower front of the exhaust side of the engine near the alternator which outputs 12 pulses (reluctor pulses) per engine crankshaft revolution.

80 Pin Plug

8

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80 Pin Plug

9

S2

Automatic Transmission No.2 Shift Solenoid

Output

This pin is used to control the automatic transmission No.2 shift solenoid.

The automatic transmission gear selection is controlled by electronic solenoids.

This pin outputs battery voltage to turn the No.2 shift solenoid ON as required . The No.2 shift solenoid is ON in gears 2 & 3. The other side of the No.2 shift solenoid is Grounded inside the automatic transmission.

80 Pin Plug

10

S1

Automatic Transmission No.1 Shift Solenoid

Output

This pin is used to control the automatic transmission No.1 shift solenoid.

The automatic transmission gear selection is controlled by electronic solenoids.

This pin outputs battery voltage to turn the No.1 shift solenoid ON as required. The No.1 shift solenoid is ON in gears 1 & 2. The other side of the No.1 shift solenoid is Grounded inside the automatic transmission.

80 Pin Plug

11

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80 Pin Plug

12

SLT-

Automatic Transmission Line Pressure Control Solenoid

Output

This pin is used to control the automatic transmission line pressure control solenoid.

The automatic transmission line pressure is controlled by an electronic solenoid.

This pin in association with the SLT+ pin outputs Pulse Width Modulated (PWM) battery voltage to turn the line pressure control solenoid ON.

80 Pin Plug

13

SLN-

Automatic Transmission Accumulator Back Pressure Solenoid

Output

This pin is used to control the automatic transmission accumulator back pressure control solenoid.

The automatic transmission accumulator back pressure is controlled by an electronic solenoid.

This pin is connected to Ground inside the ECU as required in a PWM fashion to control the accumulator back pressure control solenoid ON. The accumulator back pressure control solenoid should be wired with one side of the solenoid connected to battery voltage (Main EFI Relay switched) and one side of the solenoid connected to this ECU pin.

80 Pin Plug

14

SLU-

Automatic Transmission No.3 Lock Up Solenoid

Output

This pin is used to control the automatic transmission No.3 lock up control solenoid which is used to enable torque converter lock up.

The automatic transmission lock up torque converter is controlled by an electronic solenoid.

This pin is connected to Ground inside the ECU as required to turn the No.3 lock up solenoid ON. When the No.3 lock up solenoid is on the torque converter lock up is engaged. The No.3 lock up solenoid should be wired with one side of the solenoid connected to battery voltage (Main EFI Relay switched) and one side of the solenoid connected to this ECU pin.

80 Pin Plug

15

#60

No. 6 Injector (Rear)

Output

This pin is used to control the No.6 fuel injector.

The fuel injectors are electronically controlled by the engine ECU.

This pin is connected to Ground inside the ECU as required to turn the fuel injector ON. The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.

80 Pin Plug

16

#50

No. 5 Injector

Output

This pin is used to control the No.5 fuel injector.

The fuel injectors are electronically controlled by the engine ECU.

This pin is connected to Ground inside the ECU as required to turn the fuel injector ON. The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.

80 Pin Plug

17

#40

No. 4 Injector

Output

This pin is used to control the No.4 fuel injector.

The fuel injectors are electronically controlled by the engine ECU.

This pin is connected to Ground inside the ECU as required to turn the fuel injector ON. The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.

80 Pin Plug

18

#30

No. 3 Injector

Output

This pin is used to control the No.3 fuel injector.

The fuel injectors are electronically controlled by the engine ECU.

This pin is connected to Ground inside the ECU as required to turn the fuel injector ON. The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.

80 Pin Plug

19

#20

No. 2 Injector

Output

This pin is used to control the No.2 fuel injector.

The fuel injectors are electronically controlled by the engine ECU.

This pin is connected to Ground inside the ECU as required to turn the fuel injector ON. The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.

80 Pin Plug

20

#10

No. 1 Injector (Front)

Output

This pin is used to control the No.1 fuel injector.

The fuel injectors are electronically controlled by the engine ECU.

This pin is connected to Ground inside the ECU as required to turn the fuel injector ON. The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.

80 Pin Plug

21

NCO+

Over Drive Direct Clutch Speed Sensor

Input

This pin is used to detect the speed of the automatic transmission O/D input shaft.

The fuel injectors are electronically controlled by the engine ECU.

This pin connects to the OD speed sensor located on the left, front side of the automatic transmission and outputs ? pulses (reluctor pulses) per revolution of the OD direct clutch drum.

80 Pin Plug

22

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80 Pin Plug

23

SP2+

No. 2 Speed Sensor

Input

This pin is used to determine vehicle speed.

Vehicle speed is used in idle control, automatic transmission shift control, speed limiting etc. Two speed sensors are used to provide a backup.

This pin connects to the No.2 speed sensor located on the left, rear side of the automatic transmission and outputs 4 pulses (reluctor pulses) per revolution of the automatic transmission output shaft.

80 Pin Plug

24

OIL

Automatic Transmission Oil Temperature Sensor

Input

This pin is used to measure the automatic transmission oil temperature.

The automatic transmission oil temperature has a significant effect on the automatic transmissions operation, the engine ECU can compensate if the automatic transmission oil temperature is measured.

This pin connects to a thermistor that is installed inside the automatic transmission to measure the automatic transmission oil temperature. One side of the thermistor should be wired to this pin and one side of the thermistor should be wired to the engine ECU pin E2 (Ground).

80 Pin Plug

25

G2

Cam Position Sensor No.1 (Front)

Input

This pin is used to detect the location of the intake camshaft.

The engine ECU needs to know if the engine is on the compression or exhaust stroke for sequential spark and ignition, the camshaft position sensor provides this information.

This pin connects to the No.2 camshaft position sensor located to the rear of the intake side of the engine head which outputs 1 pulse (reluctor pulse) per camshaft revolution. A pulse is generated slightly before the TDC on the cylinder 1 compression stroke which is used to determine the engine position for sequential ignition and fuel.

80 Pin Plug

26

G1

Cam Position Sensor No.2 (Rear)

Input

This pin is used to detect the location of the intake camshaft.

The engine ECU needs to know if the engine is on the compression or exhaust stroke for sequential spark and ignition, the camshaft position sensor provides this information.

This pin connects to the No.1 camshaft position sensor located to the front of the intake side of the engine head which outputs 1 pulse (reluctor pulse) per camshaft revolution. A pulse is generated slightly before the TDC on the cylinder 1 exhaust stroke which is used to determine the engine position for sequential ignition and fuel.

80 Pin Plug

27

NE

Crank Position Sensor

Input

This pin is used to detect the speed and location of the engine crankshaft.

The engine ECU needs to know the position of the engine so that it can accurately provide fuel and ignition.

This pin connects to the engine crankshaft position sensor located to the lower front of the exhaust side of the engine near the alternator which outputs 12 pulses (reluctor pulses) per engine crankshaft revolution.

80 Pin Plug

28

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80 Pin Plug

29

VF1

Voltage Feedback

Output

This pin is used to output diagnostic voltages that are related to the air fuel ratio and O2 sensor as well as OBD serial data.

Used to help in diagnosing issues.

This pin outputs a diagnostic voltage related to fuel trim. When the engine ECU pin TE1 is connected to Ground and the TPS IDL contact is OFF (engine ECU pin IDL1 is not connected to Ground) this pin outputs 0V when the engine ECU detects a lean O2 condition and 5V when the engine ECU detects a rich O2 condition. When the engine ECU pin TE1 is connected to Ground and the TPS IDL contact is ON (engine ECU pin IDL1 is connected to Ground) this pin outputs 0V if no trouble codes are stored and 5V if trouble codes have been stored. When the engine ECU pin TE2 is connected to Ground serial OBD data is outputted by this pin.

80 Pin Plug

30

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80 Pin Plug

31

SLT+

Automatic Transmission Line Pressure Control Solenoid

Output

This pin is used to control the automatic transmission line pressure control solenoid.

The automatic transmission line pressure is controlled by an electronic solenoid.

This pin in association with the SLT- pin outputs Pulse Width Modulated (PWM) battery voltage to turn the line pressure control solenoid ON.

80 Pin Plug

32

ISC4

Idle Speed Control Valve

Output

This pin is used to open / close the Idle Speed Control Valve (ISCV) to allow more or less air to enter the engine as required to keep the desired engine idle speed

There are a large number of items that effect idle speed (e.g. engine temperature, electrical load, etc) an Idle Speed Control Valve allows the engine ECU to compensate and attempt to maintain the desired engine idle RPM.

This pin is connected to Ground inside the ECU as required in a sequenced fashion with the other ISCVx pins to open / close the ISCV as required by the engine ECU. The ISCV has two power pins which should be connected to battery voltage (Main EFI Relay switched).

80 Pin Plug

33

ISC3

Idle Speed Control Valve

Output

This pin is used to open / close the Idle Speed Control Valve (ISCV) to allow more or less air to enter the engine as required to keep the desired engine idle speed

There are a large number of items that effect idle speed (e.g. engine temperature, electrical load, etc) an Idle Speed Control Valve allows the engine ECU to compensate and attempt to maintain the desired engine idle RPM.

This pin is connected to Ground inside the ECU as required in a sequenced fashion with the other ISCVx pins to open / close the ISCV as required by the engine ECU. The ISCV has two power pins which should be connected to battery voltage (Main EFI Relay switched).

80 Pin Plug

34

ISC2

Idle Speed Control Valve

Output

This pin is used to open / close the Idle Speed Control Valve (ISCV) to allow more or less air to enter the engine as required to keep the desired engine idle speed

There are a large number of items that effect idle speed (e.g. engine temperature, electrical load, etc) an Idle Speed Control Valve allows the engine ECU to compensate and attempt to maintain the desired engine idle RPM.

This pin is connected to Ground inside the ECU as required in a sequenced fashion with the other ISCVx pins to open / close the ISCV as required by the engine ECU. The ISCV has two power pins which should be connected to battery voltage (Main EFI Relay switched).

80 Pin Plug

35

ISC1

Idle Speed Control Valve

Output

This pin is used to open / close the Idle Speed Control Valve (ISCV) to allow more or less air to enter the engine as required to keep the desired engine idle speed

There are a large number of items that effect idle speed (e.g. engine temperature, electrical load, etc) an Idle Speed Control Valve allows the engine ECU to compensate and attempt to maintain the desired engine idle RPM.

This pin is connected to Ground inside the ECU as required in a sequenced fashion with the other ISCVx pins to open / close the ISCV as required by the engine ECU. The ISCV has two power pins which should be connected to battery voltage (Main EFI Relay switched).

80 Pin Plug

36

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80 Pin Plug

37

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80 Pin Plug

38

VSV3

Exhaust Bypass Valve Vacuum Switching Valve

Output

This pin is used to control the VSV which is used to open / close the Exhaust Bypass Valve that is a component of the sequential turbo system.

The Exhaust Bypass Valve allows exhaust gas to pre-spool the rear turbocharger prior to it coming online as part of the sequential turbo system.

This pin is connected to Ground inside the ECU as required to turn the Exhaust Bypass Valve VSV ON allowing pressurized intake air to open the Exhaust Bypass Valve. One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).

80 Pin Plug

39

VSV2

Exhaust Gas Control Valve Vacuum Switching Valve

Output

This pin is used to control the VSV which is used to open / close the Exhaust Gas Control Valve that is a component of the sequential turbo system.

The Exhaust Gas Control Valve allows exhaust gas to exit the rear turbocharger allowing it to fully come online as part of the sequential turbo system.

This pin is connected to Ground inside the ECU as required to turn the Exhaust Gas Control Valve VSV ON allowing pressurized intake air to open the Exhaust Gas Control Valve. One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).

80 Pin Plug

40

VSV1

Intake Air Bypass Valve Vacuum Switching Valve

Output

This pin is used to control the VSV which is used to open / close the Intake Air Bypass Valve that is a component of the sequential turbo system.

The Intake Air Control Valve allows pressurised air to exit the rear turbocharger allowing it to fully come online as part of the sequential turbo system.

This pin is connected to Ground inside the ECU as required to turn the Intake Air Control Valve VSV ON allowing pressurised intake air to open the Intake Air Control Valve. One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).

80 Pin Plug

41

VCC

+5V Regulated Power

Output

This pin is used to supply +5V power to the throttle position and MAP sensors.

The throttle position and MAP sensors require regulated and constant +5V to operate.

This pin outputs regulated +5V to the throttle position sensors and the MAP sensor.

80 Pin Plug

42

VTA2

Traction Control Throttle Position Sensor

Input

This pin is used to detect the position of the traction control throttle.

The measured position of the traction control throttle is a useful parameter for engine operation.

This pin measures the variable voltage from the traction control throttle position sensor that represents how open / closed the traction control throttle is.

80 Pin Plug

43

VTA1

Throttle Position Sensor

Input

This pin is used to detect the position of the engine throttle.

The measured position of the engine throttle is a useful parameter for engine operation, particularly in transient conditions such as acceleration.

This pin measures the variable voltage from the throttle position sensor that represents how open / closed the throttle is.

80 Pin Plug

44

THW

Water Temperature Sensor

Input

This pin is used to measure the temperature of the engine coolant.

The engine coolant temperature has a significant effect on the engines operation, for example requiring more fuel during ‘warm up’ conditions.

This pin connects to a thermistor that is installed at the engine coolant water outlet to the radiator on the front, upper, exhaust side of the engine to measure engine coolant temperature. One side of the thermistor should be wired to this pin and one side of the thermistor should be wired to the engine ECU pin E2 (Ground).

80 Pin Plug

45

THA

Intake Air Temperature Sensor

Input

This pin is used to measure the temperature of the engine inlet manifold air.

The engine air temperature has an effect on the engines operation, such as reducing ignition timing if the intake air is very hot.

This pin connects to a thermistor that is installed at the middle, engine side of the engine intake manifold to the radiator on the front, upper, exhaust side of the engine to measure engine air intake temperature. One side of the thermistor should be wired to this pin and one side of the thermistor should be wired to the engine ECU pin E2 (Ground).

80 Pin Plug

46

/

/

/

/

/

/

80 Pin Plug

47

/

/

/

/

/

/

80 Pin Plug

48

OX

Oxygen Sensor

Input

This pin is used to determine the exhaust gas air fuel ratio.

The engine ECU will aim for an air fuel ratio near stoichiometric (neither rich or lean) to enhance fuel economy under periods of low load.

This pin connects to the signal output of the oxygen sensor that is mounted in the exhaust. The factory oxygen sensor is a ‘narrow band’ oxygen sensor that outputs approximately 0V when the air fuel ratio is lean and approximately 1V when the air fuel ratio is rich. The engine ECU will aim to keep the engine running at stoichiometric by alternating between very slightly rich and very slightly lean conditions, as the sensor is only a narrow band sensor this is a practical way to achieve (or very close to) the desired stoichiometric air fuel ratio.

80 Pin Plug

49

KNK2

No.2 Knock Sensor (Rear)

Input

This pin is used to measure engine knock.

Engine knock can occur if too much ignition timing and poor fuel are present, as engine knock can damage an engine the engine ECU used a knock sensor to detect and compensate for knock if is detected.

This pin connects to the signal output of the knock sensor which is mounted under the intake manifold, to the rear of the engine and screwed into the side of the engine block. The knock sensor is Grounded via the engine block. 8.1kHz is the normal mode vibration.

80 Pin Plug

50

KNK1

No.1 Knock Sensor (Front)

Input

This pin is used to measure engine knock.

Engine knock can occur if too much ignition timing and poor fuel are present, as engine knock can damage an engine the engine ECU used a knock sensor to detect and compensate for knock if is detected.

This pin connects to the signal output of the knock sensor which is mounted under the intake manifold, to the front of the engine and screwed into the side of the engine block. The knock sensor is Grounded via the engine block. 8.1kHz is the normal mode vibration.

80 Pin Plug

51

/

/

/

/

/

/

80 Pin Plug

52

IGT6

Igniter Trigger Signal Cyl 6 (Rear)

Output

This pin is used to control the ignition for cylinder 6.

The ignition timing is electronically controlled by the engine ECU.

This pin is connected to +5V inside the engine ECU as required to trigger engine ignition. Ignition is triggered after approx 3.3mSec to 2mSec of dwell (Depending on RPM) on the high (+5V) to low (0V) transition.

80 Pin Plug

53

IGT5

Igniter Trigger Signal Cyl 5

Output

This pin is used to control the ignition for cylinder 5.

The ignition timing is electronically controlled by the engine ECU.

This pin is connected to +5V inside the engine ECU as required to trigger engine ignition. Ignition is triggered after approx 3.3mSec to 2mSec of dwell (Depending on RPM) on the high (+5V) to low (0V) transition.

80 Pin Plug

54

IGT4

Igniter Trigger Signal Cyl 4

Output

This pin is used to control the ignition for cylinder 4.

The ignition timing is electronically controlled by the engine ECU.

This pin is connected to +5V inside the engine ECU as required to trigger engine ignition. Ignition is triggered after approx 3.3mSec to 2mSec of dwell (Depending on RPM) on the high (+5V) to low (0V) transition.

80 Pin Plug

55

IGT3

Igniter Trigger Signal Cyl 3

Output

This pin is used to control the ignition for cylinder 3.

The ignition timing is electronically controlled by the engine ECU.

This pin is connected to +5V inside the engine ECU as required to trigger engine ignition. Ignition is triggered after approx 3.3mSec to 2mSec of dwell (Depending on RPM) on the high (+5V) to low (0V) transition.

80 Pin Plug

56

IGT2

Igniter Trigger Signal Cyl 2

Output

This pin is used to control the ignition for cylinder 2.

The ignition timing is electronically controlled by the engine ECU.

This pin is connected to +5V inside the engine ECU as required to trigger engine ignition. Ignition is triggered after approx 3.3mSec to 2mSec of dwell (Depending on RPM) on the high (+5V) to low (0V) transition.

80 Pin Plug

57

IGT1

Igniter Trigger Signal Cyl 1 (Front)

Output

This pin is used to control the ignition for cylinder 1.

The ignition timing is electronically controlled by the engine ECU.

This pin is connected to +5V inside the engine ECU as required to trigger engine ignition. Ignition is triggered after approx 3.3mSec to 2mSec of dwell (Depending on RPM) on the high (+5V) to low (0V) transition.

80 Pin Plug

58

IGF

Igniter Verification Signal

Input

This is pin is used to detect if ignition has taken place successfully.

If no ignition is occurring and fuel injection continues the spark plugs can be fouled and backfires can occur in the exhaust, the igniter sends a signal to inform the engine so that it can stop fuel injection if successful ignition is not detected.

This pin is connected to Ground by the Igniter for a short period of time after a successful ignition event has been detected.

80 Pin Plug

59

/

/

/

/

/

/

80 Pin Plug

60

PMC

Pressure Modulation Control (Wastegate) Vacuum Switching Valve

Output

This pin is used to control the VSV which controls the turbo wastegate on the front turbo. This VSV allows the engine ECU to attempt to control boost pressure.

The Wastegate Control Valve allows exhaust gas to pre-spool the rear turbocharger prior to it coming online as part of the sequential turbo system.

This pin is connected to Ground inside the ECU as required to turn the Pressure Modulation Control valve which is more commonly called the Wastegate control valve ON allowing pressurised intake air to be diverted away from the mechanical wastegate actuator. When this VSV is ON the mechanical wastegate actuator will not operate and the wastegate will not open, this will result in a very large amount of boost pressure being generated by the turbochargers. One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).

80 Pin Plug

61

/

/

/

/

/

/

80 Pin Plug

62

PIM

Pressure Intake Manifold (MAP Sensor)

Input

This pin is used to determine the manifold air pressure (MAP).

Manifold air pressure is a primary component in the speed density fuel injection control algorithm that is used, it is also used to control the sequential turbo system.

This pin connects to the signal output of the MAP sensor which contains a small sensor to measure air pressure. A small vacuum hose connects the MAP sensor to the intake after the throttle body.

80 Pin Plug

63

IDL2

Traction Control Throttle Idle Position Sensor

Input

This pin is used to detect when the traction control throttle is in the idle (fully open) position.

Knowing when the throttle is fully open allows the engine ECU to have a known position allowing it to compensate for slight variation in the analogue signal.

This pin is connected to Ground by a switch inside the throttle position sensor when the traction control throttle is fully open.

80 Pin Plug

64

IDL1

Throttle Position Idle Sensor

Input

This pin is used to detect when the throttle is in the idle (fully closed) position.

Knowing when the throttle is fully closed allows the engine ECU to have a known position allowing it to compensate for slight variation in the analogue signal.

This pin is connected to Ground by a switch inside the throttle position sensor when the throttle is fully closed.

80 Pin Plug

65

E2

Sensor Ground

Output

Sensor ground.

The throttle position and MAP sensors have a separate ground to ensure clear signals.

This pin is connected to sensor Ground inside the engine ECU. Do not connect this pin to chassis Ground.

80 Pin Plug

66

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80 Pin Plug

67

/

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80 Pin Plug

68

/

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/

80 Pin Plug

69

E1

ECU Ground

Input

Ground

Used to supply a Ground path to allow current to flow.

This pin connects to Ground or the battery negative.

80 Pin Plug

70

/

/

/

/

/

/

80 Pin Plug

71

HT

Oxygen Sensor Heater

Output

This pin is used to control the heater for the exhaust gas oxygen sensor.

The oxygen sensor requires a certain temperature to start operating, to allow this temperature to be reached quickly and allow the oxygen sensor to start operation the sensor is heated.

This pin connects to Ground inside the engine ECU as required to turn the oxygen sensor heater on. One side of the oxygen sensor heater should be wired to this pin and one side of oxygen sensor heater should be wired to battery voltage (Main EFI Relay switched).

80 Pin Plug

72

/

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80 Pin Plug

73

/

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/

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/

80 Pin Plug

74

EVAP

Evaporative Emission Control Vacuum Switching Valve

Output

This pin is used to control the VSV which is used to allow fuel vapour from the charcoal canister to enter the intake manifold and enter the engine.

Fuel vapours from the fuel tank are captured in the charcoal canister to protect the environment, the EVAP VSV is used to allow these captured emissions to be burnt during normal engine operation as determined by the engine ECU.

This pin is connected to Ground inside the ECU as required to turn the Evaporative Emissions Control Valve VSV ON allowing fuel emissions to pass to the intake manifold into the engine. One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).

80 Pin Plug

75

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80 Pin Plug

76

NSW

Neutral & Park Switch Auto Position Indicator

Input

This pin is used to determine if the automatic transmission shifter is in the Park or Neutral positions.

The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear.

This pin is connected to Ground by the automatic shifter position switch and the Starter Relay coil when the automatic transmission shifter is in the ‘N’ or ‘P’ positions.

80 Pin Plug

77

STA

Starter Signal

Input

This pin is used to determine if the engine is being cranked.

The engine ECU can take action to allow the engine to start easier if it is aware that the engine is trying to be started.

This pin is connected to battery voltage when the ignition switch is in CRANK position.

80 Pin Plug

78

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80 Pin Plug

79

E02

ECU Ground

Input

Ground

Used to supply a Ground path to allow current to flow.

This pin connects to Ground or the battery negative.

80 Pin Plug

80

E01

ECU Ground

Input

Ground

Used to supply a Ground path to allow current to flow.

This pin connects to Ground or the battery negative.

JZS147 Toyota Aristo 2JZ-GTE Engine Loom to Body Loom Pinout

Plug

Pin

Symbol

Definition

Input / Output (To engine=Input) (From engine=Output)

Description

Link

C

1

Air Conditioning ECU: SSR-

Air Conditioning Compressor Speed Sensor

Output

The body loom side of this pin connects to the AC control ECU ‘SSR-‘ input.

The engine loom side of this pin connects to the AC compressor speed sensor mounted on the AC compressor.

C

2

Air Conditioning ECU: SSR+

Air Conditioning Compressor Speed Sensor

Output

The body loom side of this pin connects to the AC control ECU ‘SSR+’ input.

The engine loom side of this pin connects to the AC compressor speed sensor mounted on the AC compressor.

C

3

Traction Control ECU: A

Traction Control Throttle Actuator

Output

The body loom side of this pin connects to the traction control ECU ‘A’ pin.

The engine loom side of this pin connects to the traction control throttle actuator motor.

C

4

Traction Control ECU: /A

Traction Control Throttle Actuator

Output

The body loom side of this pin connects to the traction control ECU ‘/A’ pin.

The engine loom side of this pin connects to the traction control throttle actuator motor.

C

5

AC Magnetic Clutch

Input

The body loom side of this pin needs to be connected to the AC magnetic clutch relay switched power output which switches battery voltage to the AC magnetic clutch to energise the clutch and turn the AC on.

The engine loom side of this pin connects to the AC magnetic clutch. The AC magnetic clutch is grounded via the engine block.

C

6

Traction Control ECU: ACM

Traction Control Throttle Actuator

Input

The body loom side of this pin connects to the traction control ECU ‘ACM’ pin.

The engine loom side of this pin connects to the traction control throttle actuator motor.

C

7

Traction Control ECU: B

Traction Control Throttle Actuator

Output

The body loom side of this pin connects to the traction control ECU ‘B’ pin.

The engine loom side of this pin connects to the traction control throttle actuator motor.

C

8

Traction Control ECU: /B

Traction Control Throttle Actuator

Output

The body loom side of this pin connects to the traction control ECU ‘/B’ pin.

The engine loom side of this pin connects to the traction control throttle actuator motor.

C

9

/

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C

10

/

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/

C

11

Traction Control ECU: BCM

Traction Control Throttle Actuator

Input

The body loom side of this pin connects to the traction control ECU ‘BCM’ pin.

The engine loom side of this pin connects to the traction control throttle actuator motor.

C

12

Traction Control ECU: GND

Traction Control Throttle Actuator

Output

The body loom side of this pin connects to the traction control ECU ‘GND’ pin to terminate the cable shield for the traction control throttle actuator motor.

The engine loom side of this pin connects to the traction control throttle actuator motor cable shield.

C

13

Hydraulic Cooling Fan ECU: SOL+

Hydraulic Cooling Fan Solenoid

Input

The body loom side of this pin connects to the hydraulic cooling fan ECU ‘SOL+’ output.

The engine loom side of this pin connects to the hydraulic cooling fan control solenoid which is mounted on the water pump.

C

14

/

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/

/

C

15

Engine Mounted Diagnostic Connector: FP

Fuel Pump Power

Input

The body loom side of this pin needs to be connected to the positive side of the fuel pump wiring.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine to allows power to be directly applied to the fuel pump in order to test its functionality.

D

1

Low Oil Level Switch

Output

The body loom side of this pin connects to the low oil level light located in the dash.

The engine loom side of this pin connects to the low oil level switch located at the sump on the front, intake side of the engine.

D

2

Engine ECU: S2

Cruise Control ECU: ECT

Automatic Transmission No.2 Shift Solenoid

Output

The body loom side of this pin connects to the cruise control ECU ‘ECT’ pin.

The engine loom side of this pin connects to the engine ECU ‘S2’ output pin.

D

3

/

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D

4

Engine Mounted Diagnostic Connector: AB

SRS Airbag Power

Input

The body loom side of this pin connects to the SRS airbag control ECU ‘LA’ pin.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.

D

5

Engine Mounted Diagnostic Connector: TEM

TEMS

Input

The body loom side of this pin connects to the TEMS control ECU ‘TEM’ pin.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.

D

6

Engine ECU: IDL2

Traction Control Throttle Open Switch

Output

The body loom side of this pin connects to the traction control ECU.

The engine loom side of this pin is connected to the traction control TPS and connects to Ground when the traction control throttle is in the idle (fully open) position.

D

7

Engine Mounted Diagnostic Connector: WA

ABS

Input

The body loom side of this pin connects to the ABS control ECU ‘WA’ pin and also the ABS light mounted in the dash.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine. Note that there is a shorting link inserted between terminals WA and WB of the diagnostic connector.

D

8

Engine Mounted Diagnostic Connector: CCO

Exhaust Gas Temperature Sensor

Output

The body loom side of this pin needs to be connected to the engine ECU ‘CCO’ pin (Pin 29 on the 40 pin engine ECU plug).

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.

D

9

Hydraulic Cooling Fan ECU: SOL-

Hydraulic Cooling Fan Solenoid

Input

The body loom side of this pin connects to the hydraulic cooling fan ECU ‘SOL-‘ output.

The engine loom side of this pin connects to the hydraulic cooling fan control solenoid which is mounted on the water pump.

D

10

Hydraulic Cooling Fan ECU: TH+

Engine Diagnostic Connector: OPT

Hydraulic Cooling Fan Thermistor

Output

The body loom side of this pin connects to the diagnostic connector mounted to the side of the engine.

The engine loom side of this pin connects to the hydraulic cooling fan thermistor that is mounted in the lower tank of the radiator.

D

11

Engine Mounted Diagnostic Connector: WB

ABS

Output

The body loom side of this pin connects to the ABS relay.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine. Note that there is a shorting link inserted between terminals WA and WB of the diagnostic connector from factory.

D

12

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/

E

1

/

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/

E

2

Engine ECU: W

Check Engine Light

Input

The body loom side of this pin needs to be connected to the engine ECU ‘W’ check engine light output pin (Pin 6 on the 40 pin engine ECU plug). Note that the engine ECU ‘W’ check engine light output pin also needs to be connected to the vehicles check engine light located in the dash.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.

E

3

Engine ECU: +B

Main EFI Relay Switched Power

Input

The body loom side of this pin needs to be connected to the main EFI relay switched power output which switches battery voltage to the ISCV, VSVs, etc. The main EFI relay is switched via the engine ECU M-REL output pin. Note that this pin does NOT supply power to the engine ECU directly, the engine ECU ‘+B’ and ‘+B1’ pins (Pin 39 and 40 on the 40 pin engine ECU plug) also need to be connected to the main EFI relay switched power output.

The engine loom side of this pin connects to the ISCV, VSVs, etc power supply pins.

E

4

Starter Signal

Input

The body loom side of this pin needs to be connected to battery voltage when the ignition switch is in the CRANK position.

The engine loom side of this pin connects to one side of the automatic transmission park / neutral switch and also the engine ECU NSW pin.

Refer to pin E5 for further information.

E

5

Starter Motor Relay Trigger Signal

Output

The body loom side of this pin needs to be connected to the starter motor relay coil to turn the relay on when the ignition switch is in CRANK position and the automatic transmission park / neutral switch is in the park / neutral position.

The engine loom side of this pin is connected to the automatic transmission part / neutral position switch and also the engine ECU STA pin.

Refer to pin E4 for further information.

E

6

ABS Control ECU: TC

Cruise Control ECU: TC

TEMS ECU: TC

Climate Control ECU: TC

Test Connector

Input

The body loom side of this pin connects to the ‘TC’ pin on a number of control modules.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.

E

7

Engine ECU: TE2

Test Enable

Input

The body loom side of this pin needs to be connected to the engine ECU ‘TE2’ input pin (Pin 19 on the 40 pin engine ECU plug).

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.

E

8

Neutral Gear Automatic Transmission Position Switch Indicator

Output

The body loom side of this pin connects to the dash to indicate when Neutral has been selected.

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the Neutral position.

E

9

Engine ECU: 2

2nd Gear Automatic Transmission Position Switch Indicator

Output

The body loom side of this pin needs to be connected to the engine ECU ‘2’ input pin (Pin 9 on the 40 pin engine ECU plug).

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the 2 position.

E

10

Engine ECU: L

Low Gear Automatic Transmission Position Switch Indicator

Output

The body loom side of this pin needs to be connected to the engine ECU ‘L’ input pin (Pin 10 on the 40 pin engine ECU plug).

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the L position.

E

11

Drive Gear Automatic Transmission Position Switch Indicator

Output

The body loom side of this pin connects to the dash to indicate when Drive has been selected.

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the Drive position.

E

12

Park Gear Automatic Transmission Position Switch Indicator

Output

The body loom side of this pin connects to the dash to indicate when Park has been selected.

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the Park position.

E

13

Engine ECU: R

Reverse Gear Automatic Transmission Position Switch Indicator

Output

The body loom side of this pin needs to be connected to the engine ECU ‘R’ input pin (Pin 7 on the 40 pin engine ECU plug) and also the reverse lights.

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the Reverse position.

E

14

Ignition Switched Power

Input

The body loom side of this pin needs to be connected to an ignition switched power source that supplies battery voltage when the ignition is in the RUN and CRANK Positions.

The engine loom side of this pin connects switched battery voltage to the alternator, automatic transmission position switch, automatic transmission No.1 speed sensor and the reverse lights.

F

1

Starter Motor Relay Switched Power

Input

The body loom side of this pin needs to be connected to the starter motor relay switched power output which switches battery voltage to the starter motor to turn it on and crank the engine.

The engine loom side of this pin connects to the starter motor solenoid. The starter motor is grounded via the engine block.

The body loom side of this pin needs to be connected to the speedometer located in the dash.

The engine loom side of this pin connects to the automatic transmission No.1 speed sensor signal output pin.

F

3

No.1 Speed Sensor: Ground

Input

The body loom side of this pin needs to be connected to pin F7 on this plug (Ground). In factory wiring this pin connects to the dash and the dash connects the speed sensor Ground pin (and other dash items) to Ground via a wire to pin F7 on this body loom plug, however this wiring can be simplified in engine transplant situations. Refer to pin F7 for further information.

The engine loom side of this pin connects to the automatic transmission No.1 speed sensor Ground pin.

F

4

Engine ECU: TE1

Test Enable

Input

The body loom side of this pin needs to be connected to the engine ECU ‘TE1’ input pin (Pin 20 on the 40 pin engine ECU plug).

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.

F

5

Traction Control ECU: TS

TEMS Control ECU: TS

Test Enable

Input

The body loom side of this pin connects to a number of control module ‘TS’ input pins.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.

F

6

Ignition Switched Power to Coils, Igniter & Fuel Injectors

Input

The body loom side of this pin needs to be connected to a relay which is turned on when the ignition is in the RUN and CRANK positions to switch battery voltage to the coils, igniter and fuel injectors.

The engine loom side of this pin connects to the coils, igniter and fuel injector power supply pins.

F

7

Dash Ground & No.1 Speed Sensor Ground

Output

The body loom side of this pin is connected to the dash to supply a Ground. In factory wiring this pin connects to the dash and the dash connects the speed sensor Ground pin to Ground via a wire to this pin. However the automatic transmission No.1 speed sensor Ground wiring can be simplified in engine transplant situations by connecting pin F3 directly to this pin and not via the dash. Refer to pin F3 for further information.

The engine loom side of this pin connects to Ground at the intake manifold.

F

8

Low Oil Pressure Switch

Output

The body loom side of this pin needs to be connected to the low oil pressure light located in the dash.

The engine loom side of this pin connects to the low oil pressure switch located on the front, lower, intake side of the engine.

F

9

Engine Coolant Temperature Dash Sensor

Output

The body loom side of this pin needs to be connected to the coolant temperature gauge located in the dash.

The engine loom side of this pin connects to the one wire engine coolant temperature sensor located at the engine coolant water outlet to the radiator on the front, upper, exhaust side of the engine.

F

10

Engine ECU: VF1

Voltage Feedback Diagnostics

Output

The body loom side of this pin connects to the under dash mounted diagnostic connector VF1 pin.

The engine loom side of this pin connects to the engine ECU VF1 pin.

F

11

Engine ECU: E1

Ground

Output

The body loom side of this pin connects to the diagnostic connector mounted under the dash and the Ground side of the catalytic converter temperature sensor thermistor.

The engine loom side of this pin connects to Ground at the intake manifold.

F

12

Tachometer Output from Igniter

Output

The body loom side of this pin needs to be connected to the dash tachometer and other vehicle systems (e.g. hydraulic cooling fan ECU, etc).

The engine loom side of this pin connects to the igniter tachometer output pin which outputs a 0V to battery voltage signal that is related to engine RPM.

F

13

/

/

/

/

F

14

Engine ECU: IDL1

Throttle Closed Switch

Output

The body loom side of this pin connects to the cruise control ECU, hydraulic cooling fan ECU, etc.

The engine loom side of this pin is connected to the throttle TPS and connects to Ground when the throttle is in the idle (fully closed) position.